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Re: KASAN: use-after-free Read in nbd_genl_connect



On 2/22/21 3:25 AM, syzbot wrote:
Hello,

syzbot found the following issue on:

HEAD commit:    f40ddce8 Linux 5.11
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=179e8d22d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e53d04227c52a0df
dashboard link: https://syzkaller.appspot.com/bug?extid=429d3f82d757c211bff3
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10d190cad00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13dc8a82d00000

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1128ae60d00000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1328ae60d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1528ae60d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+429d3f82d757c211bff3@syzkaller.appspotmail.com


#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-next.git nbd-kasan-fix


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